Hi Marco,
I confirm what you observe: I tested your code with Context version 2011.11.29 and as you mention there is no frame, but with Context version 2012.07.23 the columns are surrounded by an unwanted frame, so it seems to be a recent bug.
Best regards: OK
On 23 juil. 2012, at 21:15, Marco wrote:
> Hi,
>> the following example produces a frame around the columns since a
> few betas. Looks like a bug.
>> \definecolumnset [MyColumns] [n=2]
> \starttext
> \startcolumnset [MyColumns]
> \input knuth
> \stopcolumnset
> \stoptext
>>> Marco
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